I wonder why the measurement of a penis is length and not girth. I mean, the length almost doesn't matter at all (about 12 cm is already enough, anything above 16 cm is even too much), it's about how thick it is. Sure, the longer the thicker is often the case, but there are long thin ones and short thick ones - so why does everyone keep saying they need/have a dick of 20 cm, instead of a thick one?